---
navigation:
  title: "OR Gate"
  icon: "or_gate"
  parent: little_big_redstone:logic.md
  position: 16
categories:
  - logic
item_ids:
  - little_big_redstone:or_gate
---

# OR Gate

<FloatingColumn width="100" align="right">
	### Truth Table
	<TruthTable inputs="2" outputs="1">
		<TruthState input="0,0" output="0" />
		<TruthState input="0,1" output="1" />
		<TruthState input="1,0" output="1" />
		<TruthState input="1,1" output="1" />
	</TruthTable>
	*For details about truth tables, see the page [here](introduction.md).*
</FloatingColumn>

<Row>
	<Column>
		<RecipeFor id="or_gate" />
	</Column>

	<Column>
		<GameScene zoom="1.48" padding="3" interactive={true}>
			<ImportStructure src="../assets/structures/or_gate.snbt" />
			<IsometricCamera yaw="150" pitch="30" />
		</GameScene>
	</Column>
</Row>

OR gates are logic components that require at least one input to be ON for the output to be ON. This is the inverse of
a [NOR gate](nor_gate.md).

Since input ports can only accept one wire, an OR gate should be used when you need to combine multiple wires into one
port.

OR gates can be configured to have anywhere between 2 and 10 inputs.

<Row>
	<Column>
		<MicrochipScene color="red" includeToolbar={true}>
			<Logic name="a" x="0" y="12" type="io" data="{config:{direction:'east'}}" hide={true} />
			<Logic name="b" x="0" y="20" type="io" data="{config:{direction:'west'}}" hide={true} />
			<Logic name="and" x="32" y="16" type="or_gate" />
			<Logic name="output" x="64" y="16" type="io" data="{config:{input:false,signal_strength:15}}" hide={true} />

			<Wire from="a" fromPort="0" to="and" toPort="0" />
			<Wire from="b" fromPort="0" to="and" toPort="1" />
			<Wire from="and" fromPort="0" to="output" toPort="0" />

			<RedstoneSignal step="0" direction="east" strength="0" />
			<RedstoneSignal step="0" direction="west" strength="0" />

			<RedstoneSignal step="1" direction="east" strength="0" />
			<RedstoneSignal step="1" direction="west" strength="15" />

			<RedstoneSignal step="2" direction="east" strength="15" />
			<RedstoneSignal step="2" direction="west" strength="0" />

			<RedstoneSignal step="3" direction="east" strength="15" />
			<RedstoneSignal step="3" direction="west" strength="15" />
		</MicrochipScene>
	</Column>

	<Column>
		<MicrochipScene color="red" includeToolbar={true}>
			<Logic name="a" x="0" y="12" type="io" data="{config:{direction:'north'}}" hide={true} />
			<Logic name="b" x="0" y="20" type="io" data="{config:{direction:'south'}}" hide={true} />
			<Logic name="c" x="0" y="28" type="io" data="{config:{direction:'east'}}" hide={true} />
			<Logic name="d" x="0" y="36" type="io" data="{config:{direction:'west'}}" hide={true} />
			<Logic name="and" x="32" y="16" type="or_gate" data="{config:{input_count:4}}" />
			<Logic name="output" x="64" y="24" type="io" data="{config:{direction:'up',input:false,signal_strength:15}}" hide={true} />

			<Wire from="a" fromPort="0" to="and" toPort="0" />
			<Wire from="b" fromPort="0" to="and" toPort="1" />
			<Wire from="c" fromPort="0" to="and" toPort="2" />
			<Wire from="d" fromPort="0" to="and" toPort="3" />
			<Wire from="and" fromPort="0" to="output" toPort="0" />

			<RedstoneSignal step="0" direction="north" strength="0" />
			<RedstoneSignal step="0" direction="south" strength="0" />
			<RedstoneSignal step="0" direction="east" strength="0" />
			<RedstoneSignal step="0" direction="west" strength="0" />

			<RedstoneSignal step="1" direction="north" strength="15" />
			<RedstoneSignal step="1" direction="south" strength="0" />
			<RedstoneSignal step="1" direction="east" strength="0" />
			<RedstoneSignal step="1" direction="west" strength="0" />

			<RedstoneSignal step="2" direction="north" strength="0" />
			<RedstoneSignal step="2" direction="south" strength="15" />
			<RedstoneSignal step="2" direction="east" strength="0" />
			<RedstoneSignal step="2" direction="west" strength="0" />

			<RedstoneSignal step="3" direction="north" strength="0" />
			<RedstoneSignal step="3" direction="south" strength="0" />
			<RedstoneSignal step="3" direction="east" strength="15" />
			<RedstoneSignal step="3" direction="west" strength="0" />

			<RedstoneSignal step="4" direction="north" strength="0" />
			<RedstoneSignal step="4" direction="south" strength="0" />
			<RedstoneSignal step="4" direction="east" strength="0" />
			<RedstoneSignal step="4" direction="west" strength="15" />

			<RedstoneSignal step="5" direction="north" strength="0" />
			<RedstoneSignal step="5" direction="south" strength="15" />
			<RedstoneSignal step="5" direction="east" strength="0" />
			<RedstoneSignal step="5" direction="west" strength="15" />

			<RedstoneSignal step="6" direction="north" strength="15" />
			<RedstoneSignal step="6" direction="south" strength="0" />
			<RedstoneSignal step="6" direction="east" strength="15" />
			<RedstoneSignal step="6" direction="west" strength="0" />

			<RedstoneSignal step="7" direction="north" strength="15" />
			<RedstoneSignal step="7" direction="south" strength="15" />
			<RedstoneSignal step="7" direction="east" strength="15" />
			<RedstoneSignal step="7" direction="west" strength="15" />
		</MicrochipScene>
	</Column>
</Row>